Siren



July 27, 1943. c. s. CRAKES SIREN Filed Sept. 23, 1940 INVENTOR CLARENCE 5- CZHKEj ATTORN EYS siren and mounting arrangement .One ofythe objects of the inventionis an *im. provedarrangement. ior'drivin'g a; siren in a man- Patented July 27, 1943 therefor. 5

ppl ication September 23. 1940; V U f I w ,--=a;cai s-s. (o1. neg-53%.. I! This invention: relates. toisir'ens inxgeneral; and

by-memento;massesLia; How is an? in; more specifically. toga zdriyekfor .a :oonventional crates; at Mar V j i duced by the .sirenrrotor. .byrelements.onysaid ner. more, efiicientlyethan heretofore, and which i arrangement also enablesinstallingthe siren and} automobile in -a its driving ;mechanism'. n an positionv out pf interference withJother elements ofthe automobileengin for ldriving .bypower from said enginethrough .a mechanical connec ti9n..;therewith. 4.:

.A other obj ect: s'is an attachment adapted to' be quickly mounted on aconventional automobile engine under :the. hoodqofithe automobile; and which attachment.isladaptedzto beisecured'in positiongby means on'fsaid. engine without-the necessity of rearranging or altering existing parts on the engine.

. ,Qther objects aidyadtssagsiwill.wa in w the description and drawing 'Si ;1 is an elevational.;view ofiny invention on the front endaof an automobile engineasseen. loolging toward; saidend. ,Y fig; .2 is an elevational. view; .of the invention 7 as seen;;: from; apositional; right angles-tetheml ne 37s. rri 1. l

g g i is an elevationali View. ofv myiinv'ention" 'vided for that specific rotor; 'g- -These sirens are commonlyusedson police 5 cars; ambulances,fire"fighting-:vehicles,and the f like, and; :the: diameters. of. Ethe'ro-tors .ar re'1atively.-.large,"hence, 'it has heretofore been deemed; I .necessary tomeither:installzsuch sirens outside thexenginc hood or. ito-sp'ecially; provideif or their 1 installation underit of conventional sirens/10f: thertype I use; 'With my inve'ntion,i.the use 'ofxspecial electric motors? clutches and"'constantly i*unhirig .parts,v is i'elimi- .nated, and my device is; 1ieadily:installedEonany conventional automobileen'gine, below the'hood,

where it;is protected from. road 'dirt' and other Fig l asseen 1ool ing ;towaId -the.frontend'Tof an automobile engine ht n les. to F Briefly described, ;.1,I 1y invention; comprises J a m an qa l ag u ed'siren v de w means:

for quickly attaching} the same;;including power asidistinguished from prior attemptsto establish a driving iconnectio of the fanbelt, or the like .;Also; my invention the siren-and theincludes the arrangement of 7 power transmitting means for the rotor of such siren, in a position, where;

El a; 5 pie-an elev ib al. tiw t hfl z illustrated .injliigt. as seengfrom a 1 position at an si d; s r n heir G n a il e t n th. I

canbeiplaced under the engine hood-ofan automobile may be installed quickly and without altering the automobile construction;

flhis; invention mqde n. e ep r i u rly po e ndi .w t csqunvd sq u .5 1

undesirable impurities 'andgthe power transmit.- ting: means :to:; rotonlwhile. being a friction drive,

is, from a. practical standpoint, positive and-i reliable. V lnythedrawin the front ofan automobile on 7 said front endis: the '2' over which extendstheusualfan-belt 3; Which fan belt." may extend .Zi'n;.-.the.usual; manner down? 'wardly over-a pulleyflon-the crankshaft andover.

7 '.The fanbelt: Y pulleyis mounted on: shaft A;- for rotation, which. shaft is rigidly-secured position, although it fanbelt, after fixed position-1 -V-belt and is formed to. follow." a :fixedpathpf .atravel over-:the

. the generator pulley.-;(not shown).

may be loosenedior:replacingzthe. which, it ;:-is, again secured in rigid The fan beltf3ois .geherally a enginedrivenypulley, .oroverasuch latter: pulley and a generator pulley. For this-reason; any flexingof. the lengths of'thje b'elt between pulleys,f i 1 such: as by; application .01 .a? friction disk or. pulley betweenthestandard pul1eys-,=; and. against. the

belt,,is-injuriousto thelatter;particularly Where.

an attempt is-made torefiectidrlving.of airela frictional.engagement with such lengths;

empt i meliable, line to the; belt. Furthermore, there is below the; level of; fanibelt pulley and. :between ha an: and radiatoror-a;s ren;fa1th0 sh' th re g2 hood, in which latter ca'se; I the; rotors are:drivena.-:by.anfelectricmotorpro i purpose;:or a-speoial driv-a ing connection-: is-maintainedwith-a poweritake, j O1T, 'Wit1* special clutch'means orfthe. like em tively heavy. load; such-as; a siren; rotor, from. a

Also} such frictionail-engagement; as;-res'ults from such yielding of. the." little zif any room is ordinarily ample r a at a level above 1 The ring H ,ally outwardl thelouter en V rectly' over. the f an pulley 2 The outer end of glrotatab'ly supporting a "circular friction; disk I 5' coplanar with the I fan pulley Z'Cand' directly .over 'theflatter: -Tl'iisfric-v tion pulley also. carries apulley B. co-'axialthere-:

' (Fig. 1).

, forcibly swings arr'n back of belt'3;

ments for swinging said ariii a On the ,front sideof the-housing; an trio with the rotor axis is a--ring l0 retained ir'r position by an annular retaining. and bearing. plate n for revolving about the'ibtor are; the" latter projecting centrally through the coi'icn tric centralopenings in ringflll and plate I to outside the forwardly facing side of the" siren? The forwardly projecting end-10f the rotor :shaft- 8 has ;ta pu'lley i3- securedthereton :1

carriesiarr arm sit extending radiy therefrom .to 5a position in which d Off. 'said armi-is substantially 1 diar'n; it" carries a bear with; Abelt all. extends'oyer' rotor pulley l3 and disk ipulley 18;? The peripheryfiof disk .15 with which the latter; pulley is: connected is positionedto engage thefback ofithefan' belt 3., where the latter'is in 2 at its inner end; hence-theadisk; ISfQmay' be swung upwardly-v away. from :the :pu'll'ey 2 and downwardly to engagement with the: back 'of belt iii-without varyin'githe tension on belt -lf| :The

arm' M is normally heldfin .1 elevated:position-in which :dislnlS is spaced above'beltjl'by a rela-'* tively strongcoil springifll' ;connecting between 7 arm l4 and an ear =2| onarbracket1 2 that-is secured to therotor housingQiThisspring holds the arm against a'stop'fi'on their'otor' housing The bracket '22 also carries a shaft 24 on whioli is mounted a crank J25,- one arm; 2fi of :whi'ch engages" generally' horizohtally over ftha upper edge of arm. ll 1 andythe other arm 21 0f which; extends vertically upwardly." To the upper end:

pivotally connects at its opposite end with the upper end'oi laib'ar 29, which barris' pivoted'at: 36, intermediate lits ends-to a bfacket 3l carried on bracketlfl Theilower' end of bar:- 29 connects d i lnd ofa'cable ZSZthatmayeXtemi to t -n driver in :the .drivers seat jgf the gautomobflf Upon pulIin'g' ca-ble 33 the arm ii of the crank l l idownwardly tdcause tight i frictional engagement between disk 15 and the The abovedescribe I5 int-e engagementwith belt-fis merelyillus-I- trative of one "meansi'that may be'employed fand is -notintended to be restrictive to said means, but it 'is desirable: that wh 'atever fniean's i's used-, thaoperationthereof should eif'ecta tight the tional engagement betwee id iil'slrand -belt. i

' r mpmyeannce the description thereof will not be repeated, and

lieadbolts 9, as iridicatedin l fi'gi formed for securemeint d concen V tightlengageinent with the" cl means for moving disk the same numbers are used to designate parts similar in structure to those already described.

The principal difference between the device of Figs. 1, 2 and Figs. 4, 5,is that the device illus- 5 trated in the latter two figures, eliminates the friction disk l5. Instead, the belt I! connecting between the rotor pulley l3 and pulley l6 engages directly with belt 3 on the fan belt pulley 2, the

engagement being madewherebelt l'l.;isin firm engagement witlipulleyI S. Belt {1, in Fig. 4,

y be a standard industrial belt or it may be formed use is very frequent, in order to overcome any possible tendencyto polish or to result in excesssiveywear. ,The elimination of the friction disk, fprevidesnoremy for greater economy in manu factureqibutalso reduces the over-all depth of theassembly'in direction longitudinally of the automobile, thus enabling installation of the siren lino-an automobilezwhere there we wise-be a-slack oii-adequate-- space.

It is important tQfE ObSCI VB' th problems that existfiwheregsmall and easily' actu= 1 aetd' mechanical horn's have been used. Ajuto mobile; siren's the" character hreini'des'ci'ib'ed' require. considerable power "for their operation and such ipo'weriis notxavailable by mammaticnalengagement' with an unsupported length 0 of the fan-belt withoutinjurytothdb "Since the instant invention does not alter Zthe'presn't automobile structure, and is readily installedg by use 'ofthose ielenients already present in an auto ment in 1 addition to? being a new arrangement in combination witheanl automobile" engine. fflaving'described m invention, I claim? 1. A siren attachment-for an autofnobile'eiigine that isiprovidedzwltha ran-pulley and a including a housing, a siren rotor thereinaiid a friction-drive device' connected "witli said ro'tor arranged-and-"adapted to be driven upon me: tional engagement between' frictiori drive mean said device and said fan-belt-foij'causing rotation of said-rotonlsaid iriction drivedevice c'orn'prisin'g' a first pulley'on said rotor, a secondpulleykrr endless gb'elt connecting betweengsaiw ii'r stf pulley and said second pulley, eans-roman up ort; ing saidsecond pulley for rotation n its central axis and.forrevolvablemoverfieiit about the central:axis ofs'aid first pulley, a-bracliet supporting 7 said siren assembly as a unit 'for' 'secure'r'nent to Y 5 said.eng'irie in a position with-Said second" pulley. adjacent saidlfaneblt; means-for so securing;

V saidbraeket to said enginefor""supporting said:

}pulleyadapted to frictionally engage said tanbelt 'at a point on theilatter Where the'fain-belt is supportedonsaid fan pulley' when saidbracket is secured to said engine anemia siren assembly is in's'aid position;'said'friction drive means being 35; movablewith said'secbnd p'ulleyabout said axisof' said first pulley whereby said radioactive means" dent of position engagingf may b mov'd into an said fanbelt. r

2. ma constfu m'fricti'o said en pulley.

3. A sir gine that is provided-with' afan 'pulieyland a ranwith a special friction back to give where uld oth'er- V V tthe' probierns heressolvediare not to'lbe confused 'with th'ose' 1 mobileiengine',it m'ayibeclassedas an attaclibelt on said pulley comprl's'ing za siren assembly siren assembly inisaid position; and frictiondrive means: in driving connection-{with said sccbfi c tion a'sd'efined in claim *1, n dfive' mea'ns" comprising theportion of dless blt that extends'ovehsaid-second en famine-at m as i waistline said fan-pulley,

* of engagement supporting said member for said movement. V 4. In a construction as defined in claim 3, said 2,325,175 bracket, a siren assembly carried by said bracket,

sai

connected with said rotor for revolving the latter upon frictional engagement between said member and said fan belt, means for securing said bracket means for moving said member rotor and bracket into and out with said fan-belt, and means relative to said member comprising an annular disk having a first pulley secured thereto for rotation therewith, a second pulley secured an endless drive belt, connecting between said with said rotor for rotation of the latter upon rotation of said drive member; means for swin at a point where the latter is supported against said fan-pulley; and means connecting vbetween said drive member and said rotor, including an 6. In a construction as defined in claim 5, said v j rotary drive member including a pulley supportopposite end of said belt;

projecting radially outwardly of the first men- I tioned pulley, whereby said endless belt at said pulley may engage the fan belt to driven by said fan belt.

arm at its end remote from said siren connected- 7 be frictionally r I CLARENCE S. CRAKES. V 

